véraláfutás

Véraláfutás, commonly known as a bruise, is a type of internal bleeding that occurs when small blood vessels near the skin's surface are damaged. This damage typically results from a direct impact or trauma to the body, such as a fall or a blow. The force of the impact causes the capillaries, the smallest blood vessels, to rupture, allowing blood to leak into the surrounding tissues.

Initially, a fresh bruise often appears reddish or purplish due to the presence of oxygenated blood. As the body begins to break down the leaked blood, the color changes. Hemoglobin, the protein that carries oxygen in red blood cells, is gradually converted into other pigments. This process leads to the bruise turning blue or black, then green, and finally yellow or brown as it heals. The duration of these color changes varies depending on the size and depth of the bruise.

Bruises can range in severity from minor skin discolorations to more serious subcutaneous hematomas, which are collections of blood under the skin. While most bruises are harmless and resolve on their own within a few weeks, persistent or unusually frequent bruising can sometimes indicate an underlying medical condition, such as a bleeding disorder or a deficiency in certain vitamins. Medical attention may be warranted if a bruise is extremely painful, significantly swollen, or accompanied by other concerning symptoms.